Anyone working with GPS?

Hi, I was wondering if someone here works with gps devices in an artistic context. The fact is that I usually make sound recordings walking without a destination in mind and I'm interested in having some way to produce later a map of where I've been. Maybe you can do that with any gps device, I don't know, but I would like to know what kind of gps devices use people who do things like gps drawings.

I use an application for my phone called Instamapper which logs all your GPS coordinates in intervals that you specify. It also has an API so you can do a lot with the data it tracks, like make a line drawing based on your coordinates. Instamapper has made applications that you can download to your cell phone so as long as you have a data plan, you can constantly be tracking your GPS coordinates without carrying another device. You can find the Instamapper website here